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Answer:
The first ring can fit 2 valance electrons the 2and 3rd ring can fit 8 valance elctrons. The substances want to be eaual.
Explanation:
Octect rule- Atoms need 8 valance electrons to become stable (you need 8 to be great).
Enert- Noble Gasses don't bond because they already have 8 valance electrons.
Metals-lose electrons-Cation
Non metals-gain electrons-Anion
Bonds occur due to the transfer of valence electrons lost/gained.
Ionic bonds-One of many occur between meets and non metals.